Hi Anubhav,
Yes, there is a fair amount of concept from Linear Algebra and Multi-Variate calculus.
Most of the concepts are covered in the Machine Learning Course which are required for a high level understanding of the key Algorithms and implementation.
From the interview viewpoint for Maths part, you have to spend sometime for intuitive understanding of the concepts so that if asked, you can explain it atleast whats the functionality of the concept and its significance.
I will try to post the questions I was asked in some ML interviews and then you can get a fair bit of idea what to expect.
Hope this post helps.
Thanks!